Jawabanmu

2014-05-08T19:50:58+07:00
Gambar 1
AB = 30°/360° × π × d
AB = 1/12 × 3,14 × 2 × 18
AB = 1/12 × 113,04
AB = 9,42 cm

CD = 30°/360° × π × d
= 1/12 × 3,14 × 2 (18+6)
= 1/12 × 3,14 × 48
= 12,56 cm

AC=BD= 6cm

Keliling ABCD = AB + CD + AC + BD
= 9,42 + 12,56 + 6 + 6
= 33,98 cm

Gambar 2
L QRVU = QR × RV
80 = QR × 8
QR = 10 cm

RV =UT = 8 cm

L PQUT = PQ × UT
120 = PQ × 8
PQ = 15 cm

Volume = PQ × UT × QR
= 15 × 8 × 10
= 1200 cm^3
kalau yang gambar 2 gimana ka?
udah aku edit. tadi kelupaan.. hehe